The GEFU Roasting and Oven Thermometer 3 in 1 Messimo measures both the temperature in the meat and the temperature in the barbecue. You can also see on the thermometer which temperature is recommended, the type of meat you are roasting. In addition, the thermometer has an extra indicator for cooking at low temperatures (80 and 90 degrees Celsius). The thermometer measures temperatures between 25 and 300 degrees Celsius. The part of the thermometer that goes into the meat has a length of 10.5 centimeters.